A noble metal is one which is inert and does not react with acids like HCl,HNO3,H2SO4. Select an option with a set of two noble metals.
Gold (Au); Lead (Pb)
Gold (Au); Platinum (Pt)
Iron (Fe); Platinum (Pt)
Gold (Au); Copper (Cu)
Gold (Au) and Platinum (Pt) are noble metals and are inert towards HCl,HNO3,H2SO4.
Which of the following metals should be chosen to react with CuSO4 solution to make its color disappear?